Grade 2 Math Practice Test: Adding and Subtracting on a Number Line
- Adding and Subtracting on a Number Line
- 10 questions
- 12 minutes
On a number line, adding moves you to the right and subtracting moves you to the left. Big jumps of 10 save time.
Tap an option to mark your answer. You can change your mind, or tap the same option again to leave the question blank. The correct answers and explanations appear when you finish the test.Tap an option to answer; tap it again to leave the question blank.
Your result
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- 0 wrong
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Question 1
Start at 23 on a number line. Jump 10 to the right. Where do you land?
Correct answer: B
Moving right adds, so 23 + 10 = 33. The answer 13 moves to the left instead.
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Question 2
Start at 50 on a number line. Jump 7 to the left. Where do you land?
Correct answer: D
Moving left subtracts: 50 − 7 = 43. The answer 57 jumps to the right.
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Question 3
Rosa starts at 36. She makes a jump of 10, another jump of 10 and then a jump of 5, all to the right. Where does she land?
Correct answer: A
36 + 10 = 46, 46 + 10 = 56 and 56 + 5 = 61. Stopping at 56 forgets the last jump of 5.
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Question 4
Which number is halfway between 40 and 50 on a number line?
Correct answer: C
40 and 50 are 10 apart, and half of 10 is 5, so 40 + 5 = 45. The answer 90 adds the two numbers.
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Question 5
What number does the dot show?
Correct answer: B
The dot is 2 marks to the right of 65, so it shows 67. The answer 7 counts the marks from 60 but forgets the 60.
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Question 6
Max jumps from 28 to 40 on a number line. How long is his jump?
Correct answer: D
From 28 to 30 is 2, and from 30 to 40 is 10, so the jump is 2 + 10 = 12. The answer 68 adds 28 and 40.
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Question 7
To solve 52 − 8, Eli first jumps back 2 to land on 50. How far does he jump back next?
Correct answer: A
He must jump back 8 in all, and 2 is done, so 8 − 2 = 6 more. He lands on 50 − 6 = 44.
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Question 8
Start at 15. Jump 20 to the right, then jump 5 to the left. Where do you land?
Correct answer: C
15 + 20 = 35, and 35 − 5 = 30. The answer 35 forgets the jump to the left.
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Question 9
A ribbon is 34 cm long. Lena cuts off 9 cm. Which number line move shows how long the ribbon is now?
Correct answer: D
Cutting makes the ribbon shorter, so start at its length, 34, and move 9 to the left: 34 − 9 = 25 cm. Jumping right would make the ribbon longer.
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Question 10
Ana is at 75 on a number line and wants to get to 100. She jumps 5 to land on 80. How long is her next jump if it lands exactly on 100?
Correct answer: B
From 80 to 100 is 2 tens, which is 20. Together the jumps are 5 + 20 = 25, the full distance from 75 to 100.
Questions you leave blank are not counted as wrong.
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